#include <bits/stdc++.h>
using namespace std;
class Solution
{
public:
  int combinationSum4(vector<int> &nums, int target)
  {
    int dp[1010]{};
    dp[0] = 1;
    for (int i = 1; i <= target; i++)
    {
      for (int x : nums)
      {
        if (x <= i)
          dp[i] += dp[i - x];
      }
    }
    return dp[target];
  }
};
int main()
{
  Solution s;

  return 0;
}
